hello all
i'm new to odoo and i have a problem in my snippet where i trying to create new one but it seems required  something called insert action 
her's my snippet xml code 

<template id="snippet_selection" inherit_id="website.snippets">

        <xpath expr="//div[@id='snippet_structure']/div[hasclass('o_panel_body')]/t[@t-snippet='website.s_cover']"         position="after">
<t t-snippet="bootstraptheme.snippet_testimonial" 

            t-thumbnail="bootstraptheme/static/img/emp.png"/>

         </xpath>

</template>

<template id="snippet_testimonial" name="Testimonial snippet">

<div id="snipt" >

  <img alt="client" class="img-circle" src="bootstraptheme/static/img/emp.png"/>

            <h3>Employee Name</h3>

          <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>

          </div>

</template>

      when i trying to upgrade my snippet the error is:

" Testimonial snippet have not insert action: data-drop-near or data-drop-in"

Thanks